carroll



June Z4, 1930. D. c. CARROLL.

PUNCH PRESS 2 Sheets-Sheet l Filed March 27, 1924 June 24, 1930. D. c.CARROLL PUNCH PRESS 2 Sheets-Sheet 2 Filed March 27, 1924 www.

Patented June 24, 1930 UNITED STATES DALLAS C. CARROLL, OIE' AKRON,OHIO, ASSlG-NOB TO THE FIRESTONE STEEL I PROYDCTS COMPANYQOF AKRON,OHIO, A CORPORATION F OHIO PATENT oTFIcE' f PUNCH :PRESSy f Thisinvention relates to punch presses and especially to multiple head organg,

presses particularly adapted for simultaneously punching a pluralityofapertures at f spaced points in the periphery of an article, such as awheel-rim of the attached lug or attached vclamp type. y

rIhe purpose of the invention is to provide an improved press of simpleconstruction and speedy operation and vone which is adaptedsimultaneously'to punch a number of'spacedv apertures at spaced pointsin an article, such as a wheel-rim, whereby punching operations arereduced to a minimum and proper spacing of the apertures is assured.More particularly the invention contemplates the arrangement of a numberof tool-carrying heads so as to operatevupon lan article from differentsides thereof and means Vfor simultaneously operating the heads toperform a plurality of punching operations at one time. y

Another object of the invention is to provide spaced dile-blocks forcooperationwith 25 the punches and for supporting the article inposition for theppunching operation.k A further object is to providemeans on the tool-carrying heads adapted securely to clamp the articlein place on the die-blocks as the 'punching operation is performed andadapted to be withdrawn from such engagement as the punches arewithdrawn to permit removal of the finished ,Work and the` mounting ofanother article in the machine.

Other objects will appear from' theQollowing detailed description of thepress vin connection with the accompanying` drawings in which theinvention lis illustrated in its preferred form, it being understoodlthat the drawings and description are for thev purpose ofillustration'only and that the invention is not wholly limited in theclaims to the specific embodiment shown.

'Of the accompanying drawings Figure 1, is a vertical section on line1-1 of Figure 2.

Figure 2 is a plan, the driving means shown in Figure 1 being omitted.

Figure 3, is an enlarged detail view showing the cooperation with thework of a headl and a die-block. Figure 4, is a section on line 4%-4 oFigure 1. y p

VReferring to the drawings, l0 represents a suitable frame formed atyone Vend with an upstanding annular support or table 11 v on which islmounted ka generally circular Y casting'12 formed with a central ybore13 .and a plurality, in this instance four, spaced inwardly anddownwardly slopingy guideways 14, 14, the outer ends of whichprojectbeyond the generally' circularv portion of the casting. The kcenterplate 12 may also be provided with suitably formed recesses 15, 15adapted to receive and support dieblock holders 16, 16which are securedin` the recesses 15 in any suitable manner as by stud bolts 17, 177. Thedie-holders 16 are adapted to have removably secured therein, dieblocks18, 18 having die-apertures 19, 19 therein (Fig. 3),*the holders 16being apertured, asfat 20, 20 to permit punchings to-fall fromthemachine.V For clamping the die-blocks inthe holders, clamping plates 21,21are provided, the plates being clamped onto the die-blocks byynuts`22, 22 onthe stud bolts 17. The spaced -`die-blocks are adapted tosupport an articleu such as a rim thereon in position for a punchingoperation. l t Each guideway 14 is formed with an undercut guide groove23,`the groove being denedon one-side by an adjustable bar 24 secured soas lto be horizontally slidable inthe groove 23 by cap-screws indicatedat 25 inserted through slots in they bars and screwed into the bottom ofthe groove. For adjusting the bar to vary the. width of groove 23,cap-screws indicated at 26 are so operable into the groove from the sideof the guideway as to be engageable with the bars. l

Arranged for reciprocatory movement in each guideway is a sliding head27 formed with a lower dove-tail portion 28 engaged in the guide-groove23. Removably secured to each head 27 is a punch holder 29, the latterbeing secured to the head in any suit-A able manner as by cap-screws29a, 29a. A

slot is provided in each holder 29 for the reception of a punch 31 whichis adapted to be secured therein by a notch 32 formed in one sidethereof, a set screw 33 being threaded through a bore in the holder intoengagement with the notch. On the top of each head 27 is secured, as bystud bolts indicated at 34, a clamping plate 35VV formed of a flat stripof metal which projects beyond the inner end of each head and .has anupwardly curved inner end adapted to engage the work, such as the rimdenoted R, as the punching operation is performed, the engagement beingyielding due to the spring o f the projecting portion of the metalstrip.

To the end that all of the heads 27 will be simultaneously operated in'radial reciprocations inwardly and outwardly there is provided avertical reciprocating rod 36 formed as an eye-bolt the eye of which Vissecured by a pinv 37 to a sliding block 38 slidably receivedin kverticalguideways indicated at 39 formed in the frame 10. For reciprocatingtherod 36, a connecting rod orv pitman 40 is hingedly connected to thepin37 and to a crank-pin 41 on a crank shaft 42. The crank shaft 42 isadapted to be rotated by a gear 43 driven by a motor 44 through asuitable reduction gear train including gears 45, 46, 47, 48, and 49,the lastlmentioned gear being on the motor shaft. Adjustably mounted ontherod 36 is a spider having a bore 51 therein for the reception of therod 36, the spider being formed with an upwardly extending sleeve 52adapted slidably to fit in the bore 13, a suitable bushing 53v beinginterposed between the sleeve 52 and the bore. The spider is adjustablysecured on the rod 36 by a nut 55 screw-threadedly received on the rodand formed with an enlarged upper por tion fitting in a recess 56 in thespider the nut being secured to the spider by a generally annular plate57 encircling the nut below the enlarged upper portion thereof andsecured to theV spider by lcap-screws 58, 58. The spider 50 is formedwith four radiating horizontal arms 59, 59' on which are formed upwardlyextending b'i-furcated lugs 60, 60, respectively to which are hingedlyconnected horizontally disposed links 61, 61, the links 61 being in turnconnected to the lower ends of bow-shaped levers 62, 62 pivoted to thecasting 12 in slots 63, 63 formed in the proj ecting portion of theguideways 14.

In order that the bow-levers 62 mayY impart reciprocatory movement tothe heads 27, eachr of the latter is formed with a slotted outer portion64,(Fig. 4) arranged to receive the upper end of the lever 62. Alinedslots 65, 65 are formed in the slotted portion 64 of the head 27 so asloosely to receive a pin 66` secured by set screws 67, 67 in apertures68, 68 lformed in a bi-'furcated portion 69 of the upper end of thelever 62. A hardened roller 70 is journaled on the pin 66 between thebifurcations on the upper end of the lever 62 and is adapted to bear ona wear plate 71 secured on the inner end of the slotted portion 64 asthe head is advanced so as to bring the tool into engagement with thework, the pressure necessary to punch the rim being imparted to the head27 by the roller 70. l

ln operation motor 44 is continuously operated-whereby rod 36 isreciprocated vertically to impart vertical reciprocations to spider 50.Verticalreciprocations of spider 5 0 imparts oscillatory movement tolevers 62 which in turn impart reciprocatory movement to all of theheads 27 simultaneously.

The moven'ient of the heads 27 is so timed as to enable two operators toremove a finished rim from the machine and insert another in placethereof while the heads are receded. The rim R is placed upon thedie-blocks and asy the heads 27 advance inwardly the clamps 35 engageand securely hold the rim in place while the punches 31 are forcedthrough the rim. As the punches recede the clamps 35 are withdrawn, thefinished rim is removed and another inserted and so on. Thus a rim isinserted vpunched and removed upon every complete reciprocation oftheheads 27, the speed of the machine being determined by the speed ofworkmen in the'feeding of rims to and removal of finished rims from themachine.

lModifications of the invention may be resortedv to without departingfrom the spirit or scope yof the invention. y While the machineillustrated is particularly adapted for use in rim manufacture, it willbe apparent that it is capable of general application to the manufactureof manyy other articles for which a gang press may be found to be usefulor expedient.

By the term circumferential series as used in the appended claims I meanany arrangement of heads adapted simultaneously to operate from andtoward different sides of an object no matter what its shape may be.

- I claim:

1. A punch press for forming perforations spaced in the periphery of awheel rim having flanges, said press comprising a table formed with adepression adapted to support a rim therein and with guideways on itsperiphery sloping downwardly and inwardly toward said depression,punch-carrying heads reciprocably mounted in said guideways wherebyperforations may be made adjacent the flanges, and means forsimultaneously reciprocating said heads on said guideways.

2. A punch press for forming perforations spaced in the periphery of awheel rim hav-v ing flanges, said press comprising a table loo ' formedwith a depression adapted to support a rim therein and with guideways onits periphery sloping downwardly andrinwardly toward said depression,punch-carrying heads reeiprocably mounted in said guideways, yieldingmeans on the heads for clamping a rim in said depression as the headsare moved toward the rim, and means for simultaneously reciprocatingsaid heads.

4. A punch press forforming perforations spaced in the periphery of awheel rim having ianges, said press comprising a table formed with adepression adapted to support a rim therein and with guideways on itsperiphery sloping downwardly and inwardly toward said depression,punch-carrying heads reciprocably mounted in said guideways, -meanscomprising yieldable clamping plates on the heads and projectinginwardly of the heads-for clamping a rim in said depression as the headsare moved toward the rim, and means for simultaneously reciprocatingsaid heads.

5. A punch press for forming perforations spaced in the'periphery of awheel rim having iianges, said press comprising means providing adepression adapted to receive and support a rim7 a circumferentialseries of radial guideways about the depression sloping downwardly andinwardly toward said depression, punch carrying heads reciprocablymounted in said guideways and operable to form perforations adjacent arim flange, and means for simultaneously reciprocating said heads towardand from said depression on said guideways.

6. A punch press for forming rims, said press comprising a supportproviding a central depression to receive a wheel rim, a circumferentialseries of die blocks for supporting a rim in said depression, acircumferential series of radial guideways opposite the die blocks andsloping downwardly and inwardly .toward said die blocks, punch carryingheads reciprocably mounted on said guideways and cooperating with saiddie blocks, and means for simultaneously reciprocating said heads onsaid guideways toward and from said dies.

DALLAS C. CARROLL.

